What are the rules surounding alcohol in Morocco

From Wikitravel:

Although a predominantly Muslim country, Morocco is not dry.

Alcohol is available in restaurants, liquor stores, bars, supermarkets, clubs, hotels and discos. Some Moroccans enjoy a drink although it is disapproved in public places. The local brew of choice carries the highly original name of Casablanca Beer. It is a full flavored lager and enjoyable with the local cuisine or as a refreshment. The other two major Moroccan beers are Flag Special and Stork. Also you can find local judeo-berber vodka, mild anise flavored and brewed from figs.

Driving under the influence of alcohol is illegal even if you drank just one beer.

We were in Morocco four years ago. The old city center in Meknes was dry, but outside the city center was a huge, modern supermarket (interesting to go to in any event---you need a driver or taxi) and it had a very well stocked liquor section with a lot of interesting local wines. After that, we were finally equipped! But going into the segregated liquor area feels the way going into the XXX section of the old video rental stores used to feel. Even the checkout girl will look down on you! But that discomfort lasts only for a minute.... The moral of the story is that you will be at the mercy of your hotel for drinks if you always stay in the touristic city center, but if you happen to be on an outing with a driver, arrange to stop at a super market on the way home. For us it cost nothing extra, since our outing was shorter than expected.

In bigger cities like Marrakech and Casablanca, you find hotel bars which sell alcohol but these places are typically quite expensive from what I found. If you aren't staying at a hotel, you probably don't want to spend that much. Supermarkets still do sell alcohol: in Marrakech, the 'Asima' supermarket in Bab Doukkala does sell alcohol. Expect huge queues though since it's one of the few places in the city where alcohol is sold. Prices aren't that bad and you can get local Moroccan wines cheap.

Some smaller towns such as Essaouira also have restaurants / cafes that do sell beer, as well as one shop that I saw near the city limits that sells alcohol.